Ground anchors have become an important tool for geotechnical and structural design engineers to enhance the stability and load-bearing capacity of the soil and structures. They are considered a safe and reliable application for use in both permanent and temporary applications, being an efficient way of mobilizing dead loads deep in the ground to resist forces that would otherwise require large gravity foundations. Uses include resisting the forces induced by wind, water pressure or tension forces.
RSF Ground Anchor Systems may be used in large dams and retaining walls, holding down underpasses and underground structures, stabilizing wind turbine towers and preventing landslides. RSF’s anchoring systems can be divided into two main categories: strand anchors and bar anchors. The specific attributes of these anchors vary depending on factors such as whether they are tensioned or not, their suitability for rock or soil conditions, and whether they are intended for temporary or permanent use.
Soil anchors are pressure grouted tendons installed in either cohesive or non-cohesive soil or loose rock. The anchors transfer forces into the ground through the prestressing steel and grout body. In the free stressing length, the anchor remains free to move.
Rock anchors are post-tensioned tendons installed in drilled holes for which at least the entire bond length is located in rock. The anchor force is transmitted to the rock by bond between the grout body and the rock. Rock anchors can remain unbonded in the free stressing length allowing the anchor to be checked and re-tensioned at any time. In such cases, adequate corrosion protection for the stressing anchorage and the free stressing length must be provided.
On the other hand, the free stressing length can also be fully grouted after the anchor has been stressed, in which case future load adjustment is no longer possible.
Since 1965, we’ve partnered with clients in over 50 countries across six continents—delivering more than 600 civil structures, over 24 million square metres of building works, and 700+ wind towers. Our optimised engineering solutions improve project efficiency, enhance construction methods, and support global sustainability goals.
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